Well, let's see. . . .
- In VMX, he throws a tantrum for losing the Muppet Theater and everything else, and wishes that he was never born (again, this is supposed to reference IT'S A WONDERFUL LIFE)
- In THE MUPPETS (2011), he feels sorry for himself over how he and the rest of the Muppets drifted apart over the years
- In MMW, he's depressed because the others don't seem to realize Constantine isn't him, and appear to be happy with the way things have gone for them
- And whatever went on THE MUPPETS (2015) with him and Piggy and Denise and all that other crap, whatever. . . .